Display panel, fabrication method thereof, and display device

Abstract

A display panel, a fabrication method thereof, and a display device are provided. The display panel is divided into a display area, a line switching area, and a bending area in a horizontal direction and includes a substrate, a barrier layer, a buffer layer, an active layer, a first gate insulating layer, a first metal layer, and a second gate insulating layer sequentially formed from bottom to top. The display panel further includes a first through hole, a second metal layer, a first organic layer, a second metal layer, an interlayer insulating layer, and a third metal layer, wherein a portion of the third metal layer penetrates the interlayer insulating layer and is electrically connected to the second metal layer.

What is claimed is: 
     
       1. A display panel, wherein the display panel is divided into a display area, a line switching area, and a bending area in a horizontal direction and comprises a substrate, a barrier layer, a buffer layer, an active layer, a first gate insulating layer, a first metal layer, and a second gate insulating layer sequentially formed from bottom to top, and the display panel further comprises:
 a first through hole sequentially penetrating the second gate insulating layer, the first gate insulating layer, the buffer layer, and the barrier layer in the bending area; 
 a second metal layer partially disposed on a bottom and an inner sidewall of the first through hole and extending to a surface of the second gate insulating layer; 
 a first organic layer disposed on a surface of the second gate insulating layer away from the first gate insulating layer and in the first through hole, wherein the second metal layer is partially disposed on a surface of the first organic layer away from the second gate insulating layer; 
 an interlayer insulating layer disposed on the surface of the first organic layer away from the second gate insulating layer; and 
 a third metal layer disposed on a surface of the interlayer insulating layer away from the first organic layer; 
 wherein a portion of the third metal layer located in the display area penetrates the interlayer insulating layer and is electrically connected to the second metal layer. 
 
     
     
       2. The display panel according to  claim 1 , wherein
 the first metal layer comprises aluminum or an aluminum alloy; and/or, 
 the second metal layer comprises aluminum or aluminum alloy. 
 
     
     
       3. The display panel according to  claim 1 , further comprising:
 a second through hole penetrating the first organic layer in the display area, 
 wherein the second metal layer is partially disposed in the second through hole and is disposed on the surface of the second gate insulating layer away from the first gate insulating layer. 
 
     
     
       4. The display panel according to  claim 1 , further comprising
 a third through hole penetrating the interlayer insulating layer, the first organic layer, the second gate insulating layer, and the first gate insulating layer; and/or, 
 a third through hole, penetrating the interlayer insulating layer and the first organic layer; and/or, 
 a third through hole penetrating the interlayer insulating layer. 
 
     
     
       5. The display panel according to  claim 4 , wherein the third metal layer is partially disposed in the third through hole. 
     
     
       6. The display panel according to  claim 4 , wherein the third metal layer is partially overlapped to a grid trace of the second metal layer through the third through hole to form a parallelly-connected circuit. 
     
     
       7. A display device, comprising the display panel according to  claim 1 .